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通过田间根袋试验,在玉米拔节期和成熟期研究了微生物菌剂、腐殖酸、有机-无机复合肥、4号生根粉对根际土壤磷素利用的影响。结果表明,腐殖酸和微生物菌剂的施用,能提高玉米根际土壤有效磷含量和磷素利用率,尤以生长后期的效果更为明显。
The effect of microbial inoculant, humic acid, organic-inorganic compound fertilizer and rooting powder of No.4 on the phosphorus utilization in rhizosphere soil was studied at the jointing stage and mature stage of corn by field root bag test. The results showed that the application of humic acid and microbial inoculum could increase the content of available P and the utilization rate of P in corn rhizosphere soils, especially in later growth period.